'use strict';
const common = require('../common');
const { Duplex } = require('stream');
const assert = require('assert');
{
assert(Object.hasOwn(Duplex.prototype, 'writableFinished'));
}
{
const duplex = new Duplex();
duplex._write = (chunk, encoding, cb) => {
assert.strictEqual(duplex.writableFinished, false);
cb();
};
duplex.on('finish', common.mustCall(() => {
assert.strictEqual(duplex.writableFinished, true);
}));
duplex.end('testing finished state', common.mustCall(() => {
assert.strictEqual(duplex.writableFinished, true);
}));
}